Igorrock,

I checked my copy of COTW (9th edition) - 6,5x40R is listed, but I see no mention of bullet diameter .

Daryl,

Europe never was that exact - not even Germany alone...!
"Caliber 6.5 mm" might be even more of a mess than "caliber 8 mm"
E.g. the .25-35 Win is called 6.5x52R over here .

Regards,
fuhrmann